Question

Sunita puts on a pair of special glasses as shown below. The glasses have coloured filters in them.

(a) Sunita looks at a lamp through the green filter. The lamp gives out white light, but
appears to be green.
Explain how this is possible. [2]

(b) Sunita looks at a red lamp.

(i)What colour will the lamp appear to Sunita, if she looks at it through the red filter? [1]
(ii) Explain your answer [2]

Answer 1

a) Because as the filter was green the light emitted by lamp will also become green

b) red

Is it correct?? I m a begginer so I don't know so much answers i m giving this answer on my basis if It will be incorrect then i m sorry

Answer 2

Answer:a)green colour

b)i)red colour

ii)black colour

Explanation:

a) The green filter allows green light to pass and absorbs all the other colours. Thus, lamp appears green. b)i) The filter will allow red light to pass through it. Hence, the lamp appears red. ii) The green filter allows only green light to pass through it and it will absorb the red light. So,Sunita will see no light coming from the lamp - it appears black.